Abstract: An electronic device is provided, which includes a panel configured to identify a position of a stylus pen, a communication module configured to transmit/receive a communication signal to/from the stylus pen, and at least one processor configured to, based on detection of the stylus pen by the panel, perform a first operation based on the position of the stylus pen identified by the panel, based on non-detection of the stylus pen by the panel, identify at least one of information about the position of the stylus pen or information indicating whether a button of the stylus pen is pressed, included in at least one communication signal received through the communication module from the stylus pen, and perform a second operation based on at least one of the information about the position of the stylus pen or the information indicating whether the button of the stylus pen is pressed.

Abstract: In a case in which an electronic pen main unit made into a cartridge is held movably in a casing, electrical connections between the electronic pen main unit and electronic circuit components of the casing are reliably established. The electronic pen main unit is fitted to a fitting part disposed in a casing of an electronic pen in which the pen tip side is made to be an opening and is housed in a state of being movable in a hollow part of the casing by a movement mechanism that moves the fitting part in the axial center direction of the casing.

Abstract: A method for operating an electronic device includes detecting, by a touchscreen controller, a touch point on a touchscreen; determining, by the touchscreen controller, coordinates of the touch point; scaling, by the touchscreen controller, up the coordinates of the touch point to obtain scaled up coordinates by overwriting a reserved portion of a touch event protocol with additional information corresponding to the coordinates of the touch point; reporting, by the touchscreen controller, the scaled up coordinates of the touch point to an application processor; and determining, by the application processor, the coordinates of the touch point with an increased resolution by converting the scaled up coordinates into a floating point value.

Abstract: Disclosed herein are various embodiments of a self-capacitance device that is configured to be detectable by a known touchscreen without the need for human contact. Such a device has a device body, a capacitance structure disposed within the body, and at least three contacts disposed on one side of the body and electrically coupled to the capacitance structure. Further disclosed herein are systems having at least two such self-capacitance devices and a software application configured to recognize each of the at least two self-capacitance devices.

Abstract: The utility model provides an electromagnetic stylus having a tip, a first magnetic core, a second magnetic core and a cartridge. The tip includes a nib arranged at an end portion thereof. The first magnetic core has a first through hole. The second magnetic core is arranged on a distal end of the first magnetic core from the nib, having a second through hole. An inner diameter of the second through hole is less than an inner diameter of the first through hole, the tip sequentially penetrates through the first through hole and the second through hole. A step structure is arranged on a proximal end of the second magnetic core to the nib. A spacer is arranged on an inner wall of the cartridge, the first magnetic core and the second magnetic core are at least partially received in the cartridge and respectively positioned on two sides of the spacer, the step structure abuts against the spacer, a thickness of the step structure is less than a thickness of the spacer along a lengthwise direction of the tip.

Abstract: Multi-touch touch-sensing devices and methods are described herein. The touch sensing devices can include multiple sense points, each located at a crossing of a drive line and a sense line. In some embodiments, multiple drive lines may be simultaneously or nearly simultaneously stimulated with drive signals having unique characteristics, such as phase or frequency. A sense signal can occur on each sense line that can be related to the drive signals by an amount of touch present at sense points corresponding to the stimulated drive lines and the sense line. By using processing techniques based on the unique drive signals, an amount of touch corresponding to each sense point can be extracted from the sense signal. The touch sensing methods and devices can be incorporated into interfaces for a variety of electronic devices such as a desktop, tablet, notebook, and handheld computers, personal digital assistants, media players, and mobile telephones.

Abstract: An information handling system stylus includes components to support active tip writing inputs at a touchscreen display with the active tip powered by a rechargeable battery. An accelerometer and microphone included in the housing cooperate to manage battery life with instructions executed on a processing resource included in the accelerometer and/or microphone. The instructions apply different wake behaviors to manage stylus power consumption based upon whether the stylus couples to and information handling system, such as monitoring stylus motion with different wake intervals and monitoring for predetermined acceleration profiles, such as walking, falling and rolling.

Abstract: A position detection apparatus includes a sensor, and a controller that detects a position of a first position indicator and a position of a second position indicator through the sensor. The controller continues detecting the position of the first position indicator and halts detecting the position of the second position indicator after a state in which the positions of the first position indicator and the second position indicator are not detected changes to a state in which the position of the first position indicator is detected, and continues both detecting the position of the second position indicator and detecting the position of the first position indicator after the state in which the positions of the first position indicator and the second position indicator are not detected changes to a state in which the position of the second position indicator is detected.

Abstract: A processing system configured to detect an input object proximate the processing system. The processing system includes sensor circuitry configured to make a determination, when the processing system is in a low ground mass (LGM) state, that a large object is proximate to sensor electrodes of the processing system. The sensor circuitry is further configured, in response to a determination that a large object is proximate the sensor electrodes while the processing system is in the LGM state, to drive a first group of sensor electrodes with one of an inverted signal or a non-inverted signal and drive a second group of sensor electrodes with a static DC voltage.

Abstract: A stylus includes a body, a carrying structure, and a tip structure. The carrying structure is disposed at the body and has a ring-shaped positioning portion, and the ring-shaped positioning portion has an axial hole. The tip structure is disposed on the carrying structure, a segment of the tip structure penetrates the axial hole, and the ring-shaped positioning portion entirely covers the segment of the tip structure along a peripheral direction of the axial hole.

Abstract: In one embodiment, a method for charging a stylus of an information handling system includes: receiving, by a stylus docking slot of a keyboard of the information handling system, the stylus, the keyboard communicably coupled to the information handling system; causing, by a plurality of keyboard magnets of the keyboard, a partial alignment of the stylus in relation to the stylus docking slot, the plurality of keyboard magnets attracting a plurality of stylus magnets of the stylus; causing, by an alignment nub of the keyboard, an alignment of one or more spring contacts of the stylus in relation to one or more charging contacts of the keyboard, the alignment nub configured to removably couple to a beveled recess of the stylus; and providing, by the one or more charging contacts, power to an energy storage unit of the stylus via the one or more spring contacts.

Abstract: A touch device has multiple charging traces distributed under the touch operation area. When the object hovers over or contacts the touch operation area, the control unit of the touch device obtains the corresponding position of the object through the sensing signal of the electrode units. The control unit in turn connect the charging traces adjacent to the corresponding position of the object to form at least one charging loop. In the process of the touch operation on the touch device, the object can be charged at the same time, and the convenience of use can be improved.

Abstract: Described herein are methods and systems that use pressure sensor data as a basis for performing one or more operations in a remote access environment. For example, a device may be configured with one or more pressure sensors that, based on a user's press, may generate pressure sensor data indicating an amount of force being applied by the user's press. The pressure sensor data may be used, in accordance with the various embodiments and variations described herein, to cause one or more operations to be performed by an enterprise resource or an enterprise service. In some embodiments, the one or more operations may be performed by an application or an operating system executing in the remote access environment. Some non-limiting examples of the types of operations that may be performed include a change to a font characteristic and a change to a text characteristic.

Abstract: A duty cycle is used in conjunction with a powered oscillator to electronically reduce the current draw by reducing the average current and thus reducing the sensor radiated emissions without altering an inductive position sensor. The duty cycle and the switching of the oscillation drive enable an on and an off cycling of the inductive position sensor such that an oversampling may occur without altering the hardware, but providing the improvements. As such, the inductive position sensor may only have an oscillation signal long enough to capture a stable sample and remain off for the duration of the sampling period. As such, a reduction in radiated emissions is achieved.

Abstract: A pen-shaped position indicator includes: i) a cylindrical housing; ii) a core received in the cylindrical housing and having a pointer tip extend from a distal end of the cylindrical housing; iii) a resonant circuit comprised of an inductive element and a capacitor and received in the cylindrical housing, wherein an inductance of the inductive element changes in response to a pressure applied to the pointer tip of the core; iv) a connection member received in the cylindrical housing between the inductive element and the capacitor, wherein the connection member includes a distal surface facing the inductive element and a proximal surface facing the capacitor, and the connection member includes a terminal member having a distal end and a proximal end; and v) a first conductor disposed on a distal surface of the capacitor facing the proximal surface of the connection member, wherein the first conductor electrically connects the capacitor, via the at least one terminal of the connection member, to the inductive

Abstract: A pen mouse includes a housing, a rotatable actuator, an optical sensor and a processor. The rotatable actuator is movably disposed inside the housing along a structurally longitudinal direction and a structurally horizontal direction of the housing. The optical sensor is adapted to detect surface reflection of the rotatable actuator. The processor is electrically connected with the optical sensor and adapted to compute a rotating direction, a rotating angle and depth variation of the rotatable actuator via analysis of the surface reflection.

Abstract: When a touch sensor is approached or touched by a capacitive pen in a small area, the corresponding approach or touch signal might be slightly less than the threshold originally used for normal detection. By comparing the sum of the corresponding approach or touch signal and some adjacent signals with the threshold, the approach or touch of a small-area object that otherwise would not be detected by the original method can be determined. The capacitive pen can be made of bonded conductive fibers.

Abstract: An electronic stylus includes a hollow cylindrical casing having an opening defined in an axial end portion thereof, a core body mounted in the casing and having an axial end portion projecting out of the opening, and a core body protector covering and accommodating therein the axial end portion of the core body, and protecting the core body. The casing has, adjacent to the opening, an abutment surface lying in a direction transverse to an axial direction of the casing and an inner wall surface extending in the axial direction of the casing. The core body protector has a first surface facing the abutment surface of the casing and a second surface facing the inner wall surface of the casing.

Abstract: A stylus can include a housing and a tip. A force-sensing system can detect movement of the tip relative to the housing when a force is applied to the tip. A haptic feedback system can move the tip relative to the housing, for example by inducing a magnetic field in magnetic elements connected to the tip and the housing. The haptic feedback can be used to render texture sensations to simulate drawing on a textured surface with the stylus. As such, the same tip that is used to provide inputs can receive haptic feedback during use. The user can continue to use the tip for input even as haptic feedback is also being applied to the tip.

Abstract: A disclosed information handling system includes a touch controller and a touch device. The touch controller may include circuitry to establish a communication link with a stylus, to determine that the stylus should operate in a first one of multiple stylus modes, the first mode defining a set of stylus features to be enabled on the stylus in the first mode, to communicate, to the stylus, an indication that the stylus is to be configured in the first mode, to determine an effect of digital inking by the stylus, dependent on stylus features enabled in the first mode, to determine that the stylus should operate in a second stylus mode, the second mode defining at least a subset of stylus features to be disabled on the stylus in the second mode, and to communicate, to the stylus, an indication that the stylus is to be configured in the second mode.

Abstract: Input device power consumption can be reduced with a magnetic drive system. In some examples, the input device can include a transformer configured to generate a desired high output voltage from logic-level input pulses. In some examples, the distributed capacitance and associated resonance of the transformer can act as a low-pass filter, and can create a relatively clean output waveform from input logic signal waveforms. In some examples, the transformer can be an autotransformer. In some examples, to stabilize an amplitude of the output by sampling the output of the transformer and adjusting the input to the transformer based on the sampled output.

Abstract: An active stylus, a touch sensor, and a signal transmission and sensing method are provided. The active stylus comprises: an integrated circuit (IC) and a transmitting circuit. The IC comprises: a first modulator, a second modulator, and a mixer. The first modulator is utilized for modulating a first signal with a first frequency to generate a first frequency modulated signal. The second modulator is utilized for modulating a second signal with a second frequency to generate a second frequency modulated signal. The mixer is coupled to the first modulator and the second modulator, and utilized for mixing the first frequency modulated signal and the second frequency modulated signal to generate a mixed signal having the first frequency and the second frequency. The transmitting circuit is coupled to the IC, and utilized for transmitting the mixed signal to the touch sensor.

Abstract: An electronic device includes a housing and a user interface. One or more processors are operable with the user interface. The user interface includes a touch sensor that includes a fingerprint sensor and at least one proximity sensor component. The proximity sensor component can be collocated with a thermally conductive band circumscribing the fingerprint sensor, or can be concentrically located with the fingerprint sensor. The proximity sensor component can actuate the fingerprint sensor upon receiving an infrared emission from an object external to the housing. The fingerprint sensor or proximity sensor component can then be optionally used to control the electronic device.

Abstract: The description relates to devices having sensing tips and releasably retaining the sensing tips. One example includes a tip holder that defines a cavity that receives the sensing tip. This example also includes first and second clamps positioned radially around the tip holder and extending through holes in the tip holder into the cavity to contact the sensing tip. The example further includes a flexible clamp band positioned around the first and second clamps and biasing the first and second clamps inwardly against the sensing tip.

Abstract: A handheld device includes a conductive tip configured to interact with a capacitive based digitizer sensor, an active transmission module, a reflective transmission module, a switch configured to connect the conductive tip to one of the active transmission module and the reflective transmission module and a controller configured to toggle position of the switch. The active transmission module configured to generate a first signal on the conductive tip independent from a drive signal transmitted on the digitizer sensor. The reflective transmission module is configured to generate a second signal on the conductive tip based on the drive signal transmitted on the digitizer sensor and picked by the conductive tip during interaction with the digitizer sensor.

Abstract: An electronic ink cartridge includes, in a direction of a central axis within a cylindrical body, a core body extended out from a distal end of the cylindrical body, a coupling member disposed on a side of a proximal end of the cylindrical body, a coil housed between the core body and the coupling member and having a predetermined inductance, and a pressure sensitive element whose capacitance changes according to pressure applied to the core body. Two terminals of the coil are electrically connected respectively to two terminals of the pressure sensitive element to thereby form two terminals of a resonance circuit formed by the coil and the pressure sensitive element. A connecting terminal electrically connected to at least one of the two terminals of the resonance circuit is disposed on a proximal end surface side of the coupling member to be accessible thereon from outside.

Abstract: An electrode for an input device can be designed to reduce wobble over a range of input device orientations. The electrode can include a spherical portion and a tapered portion. In some examples, the electrode can linearly taper away from the spherical portion. In other examples, the electrode can non-linearly taper away forming an elliptical flare. Additionally or alternatively, the electrode can include a spring-loaded member that can couple the electrode to other circuitry of the input device. Additionally or alternatively, the electrode can include a neck portion coupled to the tapered portion, and part of the neck portion can be shielded. The input device can include a first non-conductive material disposed on part of the spherical portion of the electrode and a second non-conductive material disposed between part of the electrode and the first non-conductive material.

Abstract: An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.

Abstract: According to an aspect, a pointing device used to indicate a position on a touch detecting device includes: a first output unit provided to a body of the pointing device with which a hand of a user holding the pointing device comes into contact; and a first signal generating unit that generates a palm detection signal including a first code and different from a signal detected in a touch operation with the pointing device, and outputs the palm detection signal to the first output unit.

Abstract: A pen input device having malfunction prevention function and method of preventing malfunction thereof are disclosed. The pen input device includes: a housing having a bar form and having one end relatively narrowly opened to form a housing space; a resonant circuit housed within the housing; a tip that protrudes from an open end of the housing to the outside, the tip comprising a dielectric material and being configured to be movable within a predetermined range in a direction of a longitudinal axis of the housing, the tip being further configured to be self-centering; and a ground shielding portion formed in a portion of the housing in which electromagnetic induction occurs, the ground shielding portion not including the tip.

Abstract: An electronic stylus may include a wireless interface, a memory, and a processor. The wireless interface may be configured to send and receive signals to and from at least a first computing system and a second computing system. The memory may be configured to store text. The processor may be configured to store, in the memory, a text string received from the first computing system via the wireless interface, and send, to the second computing system via the wireless interface, the text string received from the first computing system.

Abstract: A capacitive stylus and a touch control apparatus applying synchronized time difference signal transmitting method are disclosed. The capacitive styluses transmit data to a touch control apparatus via wireless communication modules respectively. A non-transitory computer-readable medium of the touch control apparatus storing instructions executable to perform a synchronized time difference signal transmitting method to synchronize time difference of the signal transmitting of the capacitive styluses.

Abstract: A synchronized time difference signal transmitting method and capacitive styluses as well as a touch input apparatus applying this method are disclosed. The touch input apparatus uses a time difference synchronization module and the capacitive styluses use synchronization interfaces to synchronize time difference of the signal transmitting of the capacitive styluses.

Abstract: A position detecting device includes two different types of sensors. A position indicator includes resonant circuits that enable detection of the position indicator by a first sensor both when a first end of a chassis of the position indicator is oriented toward the position detecting device and when a second end of the chassis is oriented toward the position detecting device. The position indicator also includes a conductive cap that is provided at the second end of the chassis and that enables detection of the position indicator by a second sensor when the second end is brought close to the position detecting device. A control circuit included in the position detecting device changes processing according to when the control circuit is receiving only one of an output signal from a detection circuit coupled to the first sensor and an output signal from a detection circuit coupled to the second sensor and when the control circuit is receiving the output signals from both detection circuits.

Abstract: An active capacitive stylus and methods for touch detection and feedback actuation thereof are disclosed. The active capacitive stylus includes a conductive tip, a signal processing module and a capacitor. The conductive tip is configured to detect a touch-screen actuation signal emitted from a touch screen and to transfer a feedback actuation signal output from the signal processing module. The signal processing module is configured to process the touch-screen actuation signal received by the conductive tip and to synchronously produce the feedback actuation signal. The capacitor is disposed between the conductive tip and the signal processing module and is configured to couple the touch-screen actuation signal obtained by the conductive tip to an input of the signal processing module during the detection and to isolate the feedback actuation signal during the feedback actuation. It is achievable to accurately determine the position of the conductive tip of the active capacitive stylus.

Abstract: A handheld device includes a conductive tip configured to interact with a capacitive based digitizer sensor, an active transmission module, a reflective transmission module, a switch configured to connect the conductive tip to one of the active transmission module and the reflective transmission module and a controller configured to toggle position of the switch. The active transmission module configured to generate a first signal on the conductive tip independent from a drive signal transmitted on the digitizer sensor. The reflective transmission module is configured to generate a second signal on the conductive tip based on the drive signal transmitted on the digitizer sensor and picked by the conductive tip during interaction with the digitizer sensor.

Abstract: The invention allows size reduction of a sensor of a position detecting device of a capacitive system, which detects a position indicated by an indicator. The sensor has plural electrode conductors that are disposed adjacent to each other and are configured to receive a signal from the indicator on a first surface of a substrate having the first surface and a second surface opposed to each other. The position detecting device includes a signal processing circuit including a differential amplifier circuit that calculates a difference between signals from at least two of the plural electrode conductors. Plural connecting lines are formed on the second surface of the substrate. The plural connecting lines each have one end connected to one of the plural electrode conductors disposed on the first surface by a through-hole or a via formed through the substrate, and the other end connected to a line-concentrated part.

Abstract: A stylus for use with a digitizer sensor includes a housing confined by a first and second end, a primary tip positioned at the first end of the housing and associated with a first transmitting element, the first transmitting element having a first diameter, a secondary tip positioned at the second end of the housing and associated with a second transmitting element, the second transmitting element having a second diameter that is larger than the first diameter, a transmitting unit for transmitting a first signal with a first amplitude via the first transmitting element and for transmitting a second signal with a second amplitude via the second transmitting element, wherein the first amplitude is at least twice the second amplitude and a powering unit for powering transmission of the first and second signal.

Abstract: Embodiments of amplifiers and electrodes for capacitive styluses are disclosed. The amplifiers detect an input signal from a capacitive touch sensor, such as a touchscreen or touchpad, amplify and invert the signal, and emit the amplified and inverted signal to cause the capacitive touch sensor to detect a touch. The electrode sets, or tips, pair a sensing electrode and an emitting electrode, shielded from each other to limit interference, in a fine-point non-deforming configuration that improves usability over existing stylus tips.

Abstract: An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.

Abstract: A stylus includes a housing that extends along a longitudinal direction and includes an opening on one end, a tip that extends along the longitudinal direction and through the opening and a sensor configured to detect displacement of the tip in a direction perpendicular to the longitudinal direction.

Abstract: A touch stylus capable of detecting pressure on its tip is disclosed in the present disclosure. The touch stylus includes a body, a tip, and a pressure sensing module disposed between the body and the tip for detecting a pressure on the tip. The pressure sensing module includes a lighting unit, a pressure sensing unit connected to the tip, and a controller electrically connected to the lighting unit and the pressure sensing unit. The pressure sensing unit detects a movement of the tip relative to the body, and generates a corresponding electrical signal. The controller receives the electrical signal to drive the lighting unit for generating a corresponding optical signal. A scintillating frequency of the optical signal and a value of the electrical signal are in direct proportion, and an optical detector can transform the optical signal into the pressure on the tip.

Abstract: A capacitive stylus, as an inputting device of a touch sensitive device, comprises a pen and a detachable eraser. The pen comprises a tip for writing on a screen of the touch sensitive device, a control circuit for emitting signals to the touch sensitive device, and a battery for providing electricity to the control circuit. The eraser includes an erasing circuit and a first end to combine with the pen, so that the erasing circuit electrically connects with the control circuit. The eraser includes a second end that is compressible, so that the control circuit can emit an erasing signal to the touch sensitive device.

Abstract: A stylus device is disclosed that enables a computing device to communicate to the stylus device using a capacitive link. In an aspect, the stylus device detects a change in an electric field generated by the computing device. A message including data is received from the computing device via the change in the electric field. The message may include an identifier corresponding to a data encoding scheme to be used for sending data to the computing device. Based on the identifier, the stylus device may configure itself to operate using the data encoding scheme.

Abstract: A touch panel is disclosed. The touch panel is detects a position of a stylus, which includes first and second resonance circuits. The touch panel includes first and second coils respectively extending in first and second directions. Each of the first coils emits a first signal having a first frequency and receives a second signal having a second frequency, where emitting the first signal and receiving the second signal are successively and respectively performed by the plurality of second coils. In addition, each of second coils emits a second signal having the second frequency and receives a first signal having the first frequency, where emitting the second signal and receiving the first signal are successively performed. The first resonance circuit of the stylus generates the first signal after receiving the first signal, and the second resonance circuit of the electromagnetic stylus generates the second signal after receiving the second signal.

Abstract: In some examples, a stylus holder comprises a connector to attach to a port of a computing device and create an electrical connection to the computing device port, and a fastener to attach a stylus to the holder and provide at least one of a data and power connection to the stylus. The fastener includes a first inductive element formed in an internal cavity area of the fastener, the first inductive element to inductive couple to a second inductive element of the stylus, the second inductive element longer than the first inductive element.

Abstract: A thin electromagnetic handwriting pen includes a casing unit, a circuit unit, an electromagnetic unit and a pen core unit. The casing unit includes a thin pen-shaped casing structure. The circuit unit includes a circuit substrate disposed inside the thin pen-shaped casing structure. The electromagnetic unit includes a hollow holder and an electromagnetic coil wound around the hollow holder. Both the hollow holder and the electromagnetic coil are embedded in the thin pen-shaped casing structure, and the electromagnetic coil is fixed between the thin pen-shaped casing structure and the hollow holder and electrically connected to the circuit substrate. The pen core unit includes a pen core structure movably disposed inside the thin pen-shaped casing structure and passing through the hollow holder, and one portion of the pen core structure is exposed outside the thin pen-shaped casing structure.

Abstract: A pen-shaped coordinate indicator is provided, which is capable of preventing erroneous detection of the pressing force (writing pressure) and widening the detection range of the pressing force. The indicator includes a core body that forms a pen tip; a columnar first magnetic body having one end in contact with the core body and having another end opposing a columnar second magnetic body; and an elastic body provided between the first and second magnetic bodies. The elastic body is composed of a main body and at least one projection provided thereon, wherein the projection has a smaller resistance to the pressing force applied to the core body than the main body. When the pressing force is applied, initially the projection is mainly deformed, and thereafter the main body is mainly deformed to thereby change a distance between the first and second magnetic bodies according to the pressing force device.

Abstract: A stylus for a capacitive touch screen includes an inverting charge integrator circuit is connected to a conductive tip for providing an output signal proportional to a charge induced at the conductive tip. An inverting amplifier generates an amplified signal proportional to the signal output from the inverting charge integrator. A conductive contact provides electrical or capacitive coupling between the amplified signal and an exterior of the stylus which may provide electrical or capacitive coupling with a person holding the stylus. In other embodiments, the order of the inverting charge integrator and the inverting amplifier may be reversed. A power supply circuit powers the inverting charge integrator and the inverting amplifier. Shielding may be implemented to isolate the stylus circuitry and prevent oscillation. The provided circuitry may enable a ball point or other fine point stylus tip configurations.

Abstract: A stylus for use with a digitizer sensor includes a housing confined by a first and second end, a primary tip positioned at the first end of the housing and associated with a first transmitting element, the first transmitting element having a first diameter, a secondary tip positioned at the second end of the housing and associated with a second transmitting element, the second transmitting element having a second diameter that is larger than the first diameter, a transmitting unit for transmitting a first signal with a first amplitude via the first transmitting element and for transmitting a second signal with a second amplitude via the second transmitting element, wherein the first amplitude is at least twice the second amplitude and a powering unit for powering transmission of the first and second signal.